Billy Joel has surprised fans in London with a guest appearance from Joe Jonas during his recent Hyde Park show, with the pair singing Joel’s hit ‘Uptown Girl’ together during the show’s encore.The show took place on Friday night (July 7), as part of the venue’s British Summer Time concert series. It marked Joel’s first show in the UK in over four years, with his last performance taking place at Wembley Stadium in June of 2019.